he he. Even I can do that with great accuracy and I'm not even gay. I just hang out a lot with fags. And I've yet to be proven wrong. Methinks you have a broken gaydar.
It's in the eyes. Pay attention to what people are checking out. It's beyond conscious control. Peoples eyes widen when they're excited about something they see. Hopes, dreams and lust are all laid bare to the attentive. I'm not going to pretend that I've got some kind of superpower or am awesomely smart. It's really not that difficult. You just have to pay attention.
Poker is great practice.